BOTH INTERNATIONAL & INLAND A vessel towing is showing three forward white masthead lights in a vertical line. What does this indicate?

Correct Answer: Option B — the tow is greater than 200 meters

Rule 24(a) requires a power-driven vessel towing to display two masthead lights in a vertical line. If the length of the tow, measured from the stern of the towing vessel to the after end of the tow, exceeds 200 meters, three masthead lights must be displayed in a vertical line.